Finding the Fourth Proportional to 1,081.62, 1,492.56 and 633.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.62 : 1,492.56 = 633.60 : x
2. Step 2: Convert to fraction form
   1,081.62/1,492.56 = 633.60/x
3. Step 3: Cross multiply
   1,081.62x = 1,492.56 × 633.60
4. Step 4: Simplify right side
   1,081.62x = 945,686.02
5. Step 5: Solve for x
   x = 945,686.02/1,081.62
6. Step 6: Final answer
   x = 874.32